Texas Instruments TL2575-05IKTTR

Overview

TL2575-05IKTTR from Texas Instruments is a fixed-output 5-V, 1-A step-down (buck) switching voltage regulator in TO-263-5 package. It operates from 8 V to 40 V input, delivers ±5% output regulation over line, load, and temperature, and integrates a 52-kHz oscillator, cycle-by-cycle current limiting, and thermal shutdown. It is used in industrial power supplies requiring compact, efficient DC-DC conversion.

For engineers reviewing the TL2575-05IKTTR datasheet, TL2575-05IKTTR pinout, TL2575-05IKTTR application, or TL2575-05IKTTR equivalent, key selection criteria include input voltage range (8–40 V), guaranteed 1-A output current, fixed 5-V output with ±5% tolerance, standby current of 50 µA, and TO-263 thermal performance (R_θJA = 26.5°C/W).

Technical Context

The TL2575-05IKTTR implements a monolithic buck converter with internal 1-A N-channel MOSFET switch, fixed-frequency 52-kHz PWM control, and built-in error amplifier referenced to a 1.23-V bandgap. Its feedback loop is internally compensated and requires no external compensation components for stable operation with standard inductors.

It supports manual shutdown via TTL-compatible ON/OFF pin, enters standby mode drawing only 50 µA, and includes cycle-by-cycle current limiting, thermal shutdown, and output short-circuit protection-enabling robust operation without external fault management circuitry.

Key Specifications

Pinout & Package

TL2575-05IKTTR uses the KTT (TO-263-5) thermally enhanced surface-mount package (10.16 mm × 8.93 mm), with exposed thermal pad for PCB heat sinking. Pin 1 is VIN, Pin 2 is OUTPUT, Pin 3 is GND, Pin 4 is FEEDBACK, and Pin 5 is ON/OFF.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck regulator applications.

Compared with LM2575-5.0, TL2575-05IKTTR offers identical functionality with TI-specific qualification and thermal performance; compared with MP1584EN-LF-Z, it trades higher-frequency miniaturization for simpler BOM and proven industrial reliability at lower cost.

Availability

TL2575-05IKTTR is available at Aetrix Electronics and suitable for industrial motor drives, factory automation controllers, grid infrastructure meters, and building management systems requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TL2575-05IKTTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

TL2575-05IKTTR belongs to TI's legacy buck regulator product line designed for cost-sensitive, high-reliability industrial power conversion-emphasizing simplicity, thermal robustness, and minimal external component count.

FAQ

What is the maximum input voltage rating for TL2575-05IKTTR?

The absolute maximum input voltage for TL2575-05IKTTR is 42 V, but the recommended operating range is 8 V to 40 V. Exceeding 40 V risks violating safe operating area limits and may trigger internal protection circuits. The device is not rated for the 60-V capability of the TL2575HV family, so TL2575-05IKTTR must not be substituted into HV-designated circuits without redesign verification.

Does TL2575-05IKTTR require external feedback resistors?

No, TL2575-05IKTTR does not require external feedback resistors. As a fixed 5-V output variant, its internal feedback divider is factory-trimmed and connected internally; the FEEDBACK pin (Pin 4) is internally tied to the OUTPUT pin and must be directly connected to the 5-V output node per the datasheet. Adding external resistors would disrupt regulation accuracy and is not supported.

How does the ON/OFF pin function on TL2575-05IKTTR?

The ON/OFF pin (Pin 5) provides TTL-compatible enable control: grounding or applying <1.2 V enables normal operation; applying >2.2 V places TL2575-05IKTTR in standby mode with quiescent current reduced to 50 µA typical. The pin must never be left floating-it should be pulled to GND or VIN through a resistor if not actively driven. This feature enables system-level power sequencing and low-power sleep states.

What thermal performance can be expected from TL2575-05IKTTR in TO-263 package?

TL2575-05IKTTR in the KTT (TO-263-5) package has a junction-to-ambient thermal resistance (R_θJA) of 26.5°C/W under standard JEDEC 2S2P test conditions. With proper PCB copper pour (≥2 in² thermal pad connected to internal ground plane), it sustains 1-A continuous output at ambient temperatures up to +85°C without forced airflow. Derating is required above that point per the thermal information table in the datasheet.

Can TL2575-05IKTTR be used in inverting buck-boost configurations?

Yes, TL2575-05IKTTR can be configured as an inverting buck-boost regulator per TI Application Report SLVA017, though this requires reconfiguring the external components (inductor placement, diode polarity, and grounding scheme). In this mode, it generates a negative output voltage referenced to input ground. However, output current capability is reduced versus buck mode, and layout sensitivity increases-so validation with the exact TL2575-05IKTTR electrical characteristics is mandatory before deployment.